Mounting for gun sights



R. PECHAR Jan. 10,' 1939.

MOUNTING FORGUN SIGHTS Filed April 9, 1957 l 1 vENToR @m6/A Ik@ s ATTORNEYS Patented Jan. V10, 1.939

Nrreo sT mem- 3 Claims.

This invention relates to telescope gun-sights; and consists in improvement in the adjustable mounting of such sights that affords, with sirnplicity and cheapness of structure, accuracy in service. d

In the accompanying drawing Fig. I is a View partly in front elevation and partly in section of a gun-sight mounting of the invention; Fig. II is a View of the same device, partly in side l elevation and partly in section, the plane of section being indicated by the line II-II, Fig. I; Fig. III is a fragmentary view in section 'that illustrates the engagement of the telescope in ,its mounting, the plane of section `oi Fig. III being l5 illustrated at III-III, Fig. I; and Fig. IV is a View. comparable. with Fig. I, illustrating a modification in construction.

The sight includes a telescope (the position of Whose cylindrical case is in the drawing indicated by broken lines at T) and a mounting therefor. The mounting includes a` hoop-like frame I, carried on a pedestal 2 that is adapted to be clamped to and removed from the barrel of a gun. When the frame is mounted on a gun barrel the hoop-like frame stands above and extends in a plane transverse to the axis of the barrel. Through the hoop-like frame extend radially (with respect to a centre in the line of sight) three extensible pins, 3, 4, and 5. Of these the pins 3 and 4 stand angularly placed, at an interval of 90 with respect to their centre in the line of sight; one extends vertically, the other horizontally; both are manually adjustable in the lines of their radial extent. The third, the pin 5, is arranged on the opposite side, and extends radially upward through the frame, on a radius that bisects the ninety-degree angle at which the pins 3 and 4 stand placed; and this pin is spring backed. 'I'hese three pins, engaging 40 the telescope (with the qualification hereinafter to be explained) at three points spaced apart circumferentially at intervals less than 180, afford in this case it its entire and suicient support. Longitudinal adjustment in radial direction of pins 3 and 4 is permitted by the spring backing of pin 5. The vertically arranged pin 3, by its adjustment, affords in the assembled sight correction in the matter of elevation; the horizontally arranged pin 4 affords correction in the matter of windage. The structure as thus far described is of known form and organization.

In such structures longitudinal adjustment of the pins 3 and 4 is eiected with sureness and precision by means of a screw-threaded engagement between frame and pin. It is desirable, in

over plane and transverse surfaces.

the nterestof accuracy,`that the telescope itself, subject to the thrust of such adjusting pins d shall not be engaged by a pin (or pin-part) "that"'ro u tates as it advances@ The problern,according ly, to which the present'inventionis addressed 5 how by simplest construction t render the pins responsive to screw-thread adjustment, and yet to render the telescope `subject only to the rec'- E, tilinear movement of fthe pins in direction radial with respect to a centrein the line of sightl" 10 To such end, I surround the telescope" withfa ring 5, and upon this ring I cause the manually adjustable pins to make immediate bearin`g.""`A`d F ditionally I may, and preferably provide a two-part pin, one part of which engage"s"(with 15 screw-thread engagement) the frame, and the other of which engages the telescope-surrounding ring; and I so elaborate the structure of ring and1 L pin that rotation of the ring-engaging pin part i is prevented. 20

The ring 6 is a sleeve-like member of substantial length (Fig. III) and of internal diameter slightly exceeding the external diameter of the cylindrical case of the telescope. The walloff"l the ring 6 is provided with an orifice Eil, through 25 which orifice, in the assembly, the tongue-like extension 50 of the spring-backed pin 5 extends.

`Thus the pin 5, immediately engaging the telescope, holds it rmly in place within the`ring 65 It is upon this assembly of ring and telescope 30 that fingers 3 and 4 make engagement for purposes of adjustment, it being noted that the ring is adjustable within and in the plane of the frame I (that is, in a plane extending transversely to the axis of the telescope) for correcting the sight 35 in the matters of elevation and windage. The tip of the tongue 50 is rounded, as illustrated in Fig. III, and thus the engagement of the tongue upon the cylindrical case of the telescope is in eiect a point-to-point engagement. The posi- 40 tion in which the telescope T is by the pin 5 held Within the ring 6 is indicated in Fig. I.

In preferred refinement of structure, the pins 3 and 4 are, as has been said, two-part members. The ring-engaging parts are the parts to which 45 the numerals 3 and 4 are immediately applied. Surrounding these are the sleeve-like parts 3E) and 40; and these sleeve-like parts 30 and 40 are externally screw-threaded and thus are rendered adjustable within screw-threaded orifices in the 50 frame I. The frame I may be formed with bosses I3, through which the screw-threaded orifices are formed. The parts 30, 40 abut upon parts 3, 4 Thus the desired radial movement is transmitted to the 55 parts 3", 4; but the parts 3 and 4 are free, so far asrconcerns rotation.V The ring is grooved externally, as indicated at 6I, and the pin parts 3 and 4 are provided With tongue-like extensions 3| and 4I that, in the assembly, extend into the groove. The tongue-and-groove engagement is such that the ring 6, by virtue of its rigidity, holds the engaged pin parts 3 and 4 against turning. All rotative stress is sustained by the ring; and, so far as concerns the telescope T, it is subject to and is responsive only to the right-line adjustment of the pins.

The outer pin parts 30, 4U are provided with the usual heads 32, 42, that are shown to be knurled, for facility in turning when grasped between the thumb and nger of the user. The enlarged heads of the pin parts 30, 40 may be skirted, as indicated at 33, 43, and these skirts, and the bosses I3, I3 upon the frame (through which the screw-threaded orices are formed, and over which the skirts extend) afford surn faces upon which graduations may be formed, as is usual.

A click device (to indicate to the user even in the dark the extent of turning adjustment) may be arranged (asis usual) between the rotary and the non-rotary parts of the pins. As here shown, the non-rotary, ring-engaging parts carry integral extensions, one of Which (the extension 44) is shown. This extension' carries a springbacked click block 1, that engages a complementary ratchet 8 formed on the rotary pin part 40.

Between the orifices through which the vpins 3 and 4 extend the frame I may be slotted, as indicated at 9, and a set-screw lil may be provided for tightening the slotted frame upon the pin parts 3D and 40.

Fig. IV illustrates a simpler embodiment of the invention. Theassembly of ring (6a) and springbacked pin (5a) is the same as in Fig. I, The adjustment pins 3a, 4a, screw-threaded in frame ia, are, however,- simple, not two-part, and they, in advance and retreat, rotate in abutment upon ring 6a. The ends Sla and da, of the pins are advantageously convexed, and the outer surface of the ring is cylindrical and smooth, to the end that the contacts of the pins uponthe ring 6a shall be, substantially, point-to-point contacts. In this case also the ring 6a sustains, and by virtue of its rigidity absorbs, the rotary' stress, and only the right-line thrust is imparted to the telescope.

I claim as my invention:

1. In a gun-sight'mounting that consists essentially of a hoop-like frame through which in assembly a telescope barrel extends and a plurality of pins adjustably borne by the frame and grouped in radial arrangement with respect to the axis of the assembled telescope barrel, the improvement herein described which consists of a ring with oriced Wall, having an interior diameter greater than the exterior diameter of the telescope barrel, one of the pins in the assembly extending through the orificed Wall of the ring and engaging immediately the telescope barrel and another of the pins engaging immediately the ring on the exterior surface thereof.

2. In a gun-sight mounting that consists essentially of a hoop-like frame through which in assembly a telescope barrel extends and a pin borne in screw-threaded mounting upon the frame and extending in radial direction with respect to the axis of the assembled telescope barrel, the improvement herein described which consists of a ring adapted to encircle the barrel of the assembled telescope and a tip borne by thepin and independently rotatable thereon, the said ring and the tip of the pin engaging one another in tongue-and-groove engagement.

3. In a gun-sight mounting that consists essentially of a hoop-like frame through which in assembly a telescope barrel extends and a plurality of pins adjustably borne by the frame and grouped in radial arrangement with respect to -1 the axis of the assembled telescope barrel, the irnprovement herein described which consists in a ring having an interior diameter greater than the exterior diameter of the telescope barrel, one of Vthe pins in the assemblyextending radially inward of the ring into engagement with the telescope barrel extending through said ring, and Vanother of said pins including two relatively rotatable parts, with one part thereof engaging said ring in an engagement permissive of transverse ring adjustment, said engagement of the ring with the last-mentioned pin part being preventative of rotation of said pin part on the axis of the pin.

RUDOLPH PECHAR. 

